Los Angeles September weather
Los Angeles, United States · September
Santa Ana events can bring sudden heat and very dry air
September can host some of the strongest heat events. Long dry spells can make it feel hotter quickly.
Santa Ana winds can bring sudden heat and very low humidity, changing comfort within a day.
September averages at a glance
Average low
around 18–21°C
Average high
around 28–33°C
Average precipitation
around 0–10 mm
Rainy days
about 0–2 days
What to wear in September in Los Angeles
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Breathable clothing + sun protection works well.
- • Hydration/moisturizer option can help in very dry air.
- • Thin layer for indoors is optional.
Travel tips for visiting Los Angeles in September
- • On heat events, reduce midday outdoor time and use indoor anchors.
- • Expect comfort to change quickly during Santa Ana episodes.
September weather in Los Angeles — FAQ
Q. Why can September feel hotter than midsummer?
A. Late-summer heat events and Santa Ana winds can overlap with very dry air.
Q. Does it rain in September?
A. Usually very little, though occasional showers are possible.
Explore Los Angeles
These pages are connected so you can compare conditions and decide for yourself.